While considering the role of authoring tools, it's important to recognize that the Web is increasingly becoming an application development environment. The tools relevant to JavaScript programmers aren't the same as those used to create traditional, structured HTML documents; and we need to think carefully about the capabilities which software development tools/environments should possess in support of accessibility.
At the moment, anyone engaged in serious JavaScript user interface development needs to know WAI-ARIA and to apply WCAG directly.
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